练习2

#include<stdio.h>
#include<stdlib.h>
int main()
{
    
    int n,m,t=0;
    printf("输入正整数\n");
    scanf("%d",&n);
    while(n!=0)
    {    
   m=n%10;
   t=t*10+m;
   n=n/10;
    }
   printf("%d\n",t);
   system("pause");

    
    return 0;
}